diff --git a/src/generators.cpp b/src/generators.cpp
index 4933980..8470bea 100644
--- a/src/generators.cpp
+++ b/src/generators.cpp
@@ -27,7 +27,7 @@ sample_table_t gen_squ()
     if (i < (DEFAULT_N_SAMPLES / 2)) {
       squ_vals[i] = 1;
     } else {
-      squ_vals[i] = 0;
+      squ_vals[i] = -1;
     }
   }
 
@@ -38,7 +38,7 @@ sample_table_t gen_saw()
 {
   sample_table_t saw_vals = {0};
   float_t step = 2.0 / DEFAULT_N_SAMPLES; // calculate our incremental step size
-  float_t val = 0; // place to store calculate value
+  float_t val = -1; // place to store calculate value
 
   // Start low go high [0, 1]
   for (uint16_t i = 0; i < DEFAULT_N_SAMPLES; i++) {
@@ -54,9 +54,9 @@ sample_table_t gen_tri()
   sample_table_t tri_vals = {0};
   uint16_t half_samples = DEFAULT_N_SAMPLES / 2;
   float_t step = 2.0 / half_samples; // calculate our incremental step size
-  float_t val = 0; // place to store calculate value
+  float_t val = -1; // place to store calculate value
 
-  // Start low go high then low [0, 1, 0]
+  // Start low go high then low [-1, 1, -1]
   for (uint16_t i = 0; i < DEFAULT_N_SAMPLES; i++) {
     tri_vals[i] = val;
     if (i < half_samples) {